Lub tebchaws United Nations (UN) tau tshaj tawm tsab ntawv ceeb toom qhia tias kev cog qoob loo hauv nroog ntsuab tuaj yeem txhawb nqa kev loj hlob ntawm kev lag luam thaum siv cov peev txheej tsawg dua.
Daim ntawv tshaj tawm 'City-Level Decoup-ling: Nroog Resource Flows thiab Kev Tswj Xyuas Cov Txheej Txheem Kev Hloov Pauv' suav nrog peb caug qhov uas qhia txog cov txiaj ntsig ntawm kev mus ntsuab. Daim ntawv tshaj tawm tau muab sau ua ke thaum xyoo 2011 los ntawm International Resource Panel (IRP), uas yog tuav los ntawm UN Environment Program (UNEP).
Cov kev tshawb pom pom tau hais tias kev nqis peev hauv kev tsim vaj tsev nyob ruaj khov thiab cov cuab yeej siv tau zoo hauv cov nroog muaj lub sijhawm los ua kom muaj kev loj hlob ntawm kev lag luam, nrog rau kev txo qis ntawm ib puag ncig kev puas tsuaj, txo kev txom nyem, txo qis hauv tsev cog khoom-gas emissions thiab txhim kho kev noj qab haus huv.